TWI554943B - Method for audio signal processing and system thereof - Google Patents

Method for audio signal processing and system thereof Download PDF

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TWI554943B
TWI554943B TW104126752A TW104126752A TWI554943B TW I554943 B TWI554943 B TW I554943B TW 104126752 A TW104126752 A TW 104126752A TW 104126752 A TW104126752 A TW 104126752A TW I554943 B TWI554943 B TW I554943B
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audio
sub
frequency
filter
output
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TW104126752A
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TW201709046A (en
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李鵬
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李鵬
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Priority to CN201510507023.6A priority patent/CN106470373B/en
Priority to US14/883,337 priority patent/US9686613B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/03—Synergistic effects of band splitting and sub-band processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)

Description

音訊處理方法及其系統Audio processing method and system thereof

本發明係提供一種音訊處理方法及其系統，特別關於一種模擬耳機的音訊處理方法及其系統。The invention provides an audio processing method and a system thereof, in particular to an audio processing method for an analog earphone and a system thereof.

耳機作為音效播放裝置，可以帶給使用者良好的環場音效的使用體驗。然而長期使用耳機會造成聽覺損害，因此現在發展出以一般喇叭模擬耳機的方式。As an audio player, the earphone can give users a good experience of ring sound. However, long-term use of headphones can cause hearing damage, so the way to simulate headphones with a general speaker has been developed.

然而，一般用喇叭模擬耳機的方式，僅僅在於讓使用者的左耳聽不到右聲道的聲音，讓使用者的右耳聽不到左聲道的聲音。耳機所能展現的環場音效在使用喇叭模擬耳機時，其效果大幅下降。因此如何在以喇叭模擬耳機的系統中，使得喇叭仍然能展現環場音效中的方向性資訊，是有待克服的課題。However, the general way of simulating a headset with a speaker is simply to make the left ear of the user not hear the sound of the right channel, so that the right ear of the user cannot hear the sound of the left channel. The effect of the ring field that can be exhibited by the earphone is greatly reduced when the speaker is used to simulate the earphone. Therefore, how to make the horn still show the directional information in the ring sound effect in the system that simulates the earphone with the speaker is a problem to be overcome.

本發明在於提供一種音訊處理方法及其系統，以一般的喇叭來模擬耳機，讓使用者具有更好的聽覺體驗。The invention provides an audio processing method and a system thereof, which simulate a earphone with a general speaker, so that the user has a better hearing experience.

依據本發明的音訊處理方法，包含下列步驟：取得第一音訊資料的第一子頻音訊、取得第二音訊資料的第二子頻音訊、依據第一子頻音訊與第二子頻音訊，決定音訊參數、以音訊參數，調變第一音訊資料與第二音訊資料，以得到第一輸出音訊與第二輸出音訊。The audio processing method according to the present invention comprises the steps of: obtaining a first sub-frequency audio of the first audio data, obtaining a second sub-frequency audio of the second audio data, and determining according to the first sub-frequency audio and the second sub-frequency audio. The audio parameter and the audio parameter are used to modulate the first audio data and the second audio data to obtain the first output audio and the second output audio.

本發明所揭露的音訊處理系統，具有第一濾波器、第二濾波器、音訊放大器、音訊調變器與音訊播放器。第一濾波器用以將第一音訊資料濾波，以得到第一音訊資料的第一低頻音訊與第一子音訊，其中第一子音訊與第一低頻音訊組成第一音訊資料。第二濾波器用以將第二音訊資料濾波，以得到第二音訊資料的第二低頻音訊與第二子音訊，其中第二子音訊與第二低頻音訊組成第二音訊資料。音訊放大器耦接至第一濾波器與第二濾波器，用以依據第一子音訊與第二子音訊，決定音訊放大參數，並以音訊放大參數放大第一子音訊與第二子音訊。音訊調變器分別耦接第一濾波器、第二濾波器與音訊放大器，用以依據第一低頻音訊、第二低頻音訊、被放大的第一子音訊與被放大的第二子音訊，產生第一輸出音訊與第二輸出音訊。音訊播放器耦接至音訊調變器，用以輸出第一輸出音訊與第二輸出音訊。The audio processing system disclosed in the present invention has a first filter, a second filter, an audio amplifier, an audio modulator, and an audio player. The first filter is configured to filter the first audio data to obtain the first low frequency audio and the first sub audio of the first audio data, wherein the first sub audio and the first low frequency audio form the first audio data. The second filter is configured to filter the second audio data to obtain the second low frequency audio and the second sub audio information of the second audio data, wherein the second sub audio and the second low frequency audio form the second audio data. The audio amplifier is coupled to the first filter and the second filter to determine the audio amplification parameter according to the first sub-audio and the second sub-audio, and the first sub-audio and the second sub-audio are amplified by the audio amplification parameter. The audio modulator is coupled to the first filter, the second filter, and the audio amplifier, respectively, for generating, according to the first low frequency audio, the second low frequency audio, the amplified first sub audio, and the amplified second sub audio. The first output audio and the second output audio. The audio player is coupled to the audio modulator for outputting the first output audio and the second output audio.

綜上所述，本發明所揭露的音訊處理方法及其系統，係從第一聲道的第一音訊資料與第二聲道的第二音訊資料中，分別擷取其部份音訊，並據以調整、放大第一音訊資料被擷取的部份音訊與第二音訊資料被擷取的部份音訊，以充實輸出音訊的方向性資訊。In summary, the audio processing method and system thereof disclosed in the present invention extracts a portion of the audio information from the first audio material of the first channel and the second audio data of the second channel, respectively. To adjust and amplify part of the audio captured by the first audio data and part of the audio captured by the second audio data to enrich the directional information of the output audio.

以上之關於本揭露內容之說明及以下之實施方式之說明係用以示範與解釋本發明之精神與原理，並且提供本發明之專利申請範圍更進一步之解釋。The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

以下在實施方式中詳細敘述本發明之詳細特徵以及優點，其內容足以使任何熟習相關技藝者了解本發明之技術內容並據以實施，且根據本說明書所揭露之內容、申請專利範圍及圖式，任何熟習相關技藝者可輕易地理解本發明相關之目的及優點。以下之實施例係進一步詳細說明本發明之觀點，但非以任何觀點限制本發明之範疇。由於數位信號處理(digitalsignalprocessing, DSP) 領域的特性，本發明後述的各裝置、元件，得以軟體、韌體或硬體的方式實現數位的音訊處理與播放。The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention. Due to the characteristics of the digital signal processing (DSP) field, each device and component described later in the present invention can realize digital audio processing and playback in a soft, firmware or hardware manner.

請參照圖1，其係依據本發明一實施例的音訊處理系統架構示意圖。如圖1 所示，音訊處理系統1000 具有第一濾波器1100、第二濾波器1200、音訊放大器1300、音訊調變器1400 與音訊播放器1500。其中第一濾波器1100 與第二濾波器1200 均耦接至音訊放大器1300 與音訊調變器1400 。音訊放大器1300 更耦接至音訊調變器1400。音訊調變器1400 耦接至音訊播放器1500。Please refer to FIG. 1, which is a schematic structural diagram of an audio processing system according to an embodiment of the present invention. As shown in FIG. 1, the audio processing system 1000 has a first filter 1100, a second filter 1200, an audio amplifier 1300, an audio modulator 1400, and an audio player 1500. The first filter 1100 and the second filter 1200 are both coupled to the audio amplifier 1300 and the audio modulator 1400. The audio amplifier 1300 is further coupled to the audio modulator 1400. The audio modulator 1400 is coupled to the audio player 1500.

於一實施例中，請參照圖1，第一濾波器1100 與第二濾波器1200 均具有低通濾波器( low-passfilter, LPF)。以第一濾波器1100 為例，第一濾波器1100 中的第一低通濾波器1110 用來對來自第一聲道的第一音訊資料A1 濾波，來得到第一音訊資料A1 中的低頻音訊A1L，第一濾波器1100 並將第一音訊資料A1 與其低頻音訊A1L 相減，以得到第一子音訊A11。而第二濾波器1200 中的第二低通濾波器也用來對第二聲道的第二音訊資料A2 濾波，來得到第二音訊資料A2中的低頻音訊A2L，第二濾波器1200 並將第二音訊資料A2 與其低頻音訊A2L 相減，以得到第二子音訊A21。因此，以此實施例而言，第一子音訊A11 與第二子音訊A21 分別為第一音訊資料A1 的高頻成分與第二音訊資料A2 的高頻成分。In an embodiment, referring to FIG. 1, the first filter 1100 and the second filter 1200 each have a low-pass filter (LPF). Taking the first filter 1100 as an example, the first low pass filter 1110 in the first filter 1100 is used to filter the first audio data A1 from the first channel to obtain the low frequency audio in the first audio data A1. A1L, the first filter 1100 subtracts the first audio material A1 from its low frequency audio A1L to obtain the first sub-audio A11. The second low pass filter in the second filter 1200 is also used to filter the second audio data A2 of the second channel to obtain the low frequency audio A2L in the second audio data A2, and the second filter 1200 The second audio data A2 is subtracted from its low frequency audio A2L to obtain a second sub-audio A21. Therefore, in this embodiment, the first sub-audio A11 and the second sub-audio A21 are respectively a high-frequency component of the first audio material A1 and a high-frequency component of the second audio material A2.

音訊放大器1300 用以依據第一子音訊A11 與第二子音訊A21 的細節，將第一子音訊A11 與第二子音訊A21 放大。具體而言，請參照圖2，其係依據本發明一實施例的音訊放大器的架構示意圖。音訊放大器1300 具有波包偵測模組1310 與可控放大模組1320。波包偵測模組1310 的輸入端耦接至第一濾波器1100 與第二濾波器1200。而波包偵測模組1310 的輸出端耦接至可控放大模組1320。而可控放大模組1320 的輸出端耦接至音訊調變器1400。The audio amplifier 1300 is configured to amplify the first sub-audio A11 and the second sub-audio A21 according to the details of the first sub-audio A11 and the second sub-audio A21. Specifically, please refer to FIG. 2 , which is a schematic structural diagram of an audio amplifier according to an embodiment of the invention. The audio amplifier 1300 has a wave packet detecting module 1310 and a controllable amplifying module 1320. The input end of the wave packet detecting module 1310 is coupled to the first filter 1100 and the second filter 1200. The output of the wave packet detecting module 1310 is coupled to the controllable amplification module 1320. The output of the controllable amplification module 1320 is coupled to the audio modulator 1400.

波包偵測模組1310 用以偵測第一子音訊A11 與第二子音訊A21 的波包，並依據兩者的波包，決定一個音訊放大參數。於一種實施方式中，波包偵測模組1310 係偵測第一子音訊A11 中的第一波包與第二子音訊A21 中的第二波包，比較第一波包與第二波包分別對應的音量大小，而後依據第一波包與第二波包所對應的最大音量，決定音訊放大參數。更具體來說，若第一波包所對應的最大音量大於第二波包所對應的最大音量，則波包偵測模組1310 依據第一波包所對應的最大音量來決定音訊放大參數，反之亦然。可控放大模組1320 用以依據前述放大參數，將第一子音訊A11 中的第一波包與第二子音訊A21 中的第二波包放大。The wave packet detecting module 1310 is configured to detect the wave packets of the first sub-audio A11 and the second sub-audio A21, and determine an audio amplifying parameter according to the wave packets of the two. In one embodiment, the wave packet detecting module 1310 detects the first wave packet in the first sub audio A11 and the second wave packet in the second sub audio A21, and compares the first wave packet with the second wave packet. The corresponding volume level, and then the audio amplification parameter is determined according to the maximum volume corresponding to the first wave packet and the second wave packet. More specifically, if the maximum volume corresponding to the first wave packet is greater than the maximum volume corresponding to the second wave packet, the wave packet detecting module 1310 determines the audio amplification parameter according to the maximum volume corresponding to the first wave packet. vice versa. The controllable amplification module 1320 is configured to amplify the first wave packet in the first sub audio A11 and the second wave packet in the second sub audio A21 according to the amplification parameter.

音訊調變器1400 用以將第一音訊資料A1 中的低頻音訊A1L 與經過放大的第一子音訊A11 延遲一第一時間長度P1 後，與第二音訊資料A2 中的低頻音訊A2L 以及經過放大的第二子音訊A21 混合，產生第二輸出音訊A2o。同樣的，音訊調變器1400 將第二音訊資料A2中的低頻音訊A2L 與經過放大的第二子音訊A21 延遲第一時間長度P1後，與第一音訊資料A1 中的低頻音訊A1L 以及經過放大的第一子音訊A11 混合，產生第一輸出音訊A1o。The audio modulator 1400 is configured to delay the low frequency audio A1L in the first audio data A1 and the amplified first sub audio A11 by a first time length P1, and the low frequency audio A2L in the second audio data A2 and the amplified The second sub-audio A21 is mixed to generate a second output audio A2o. Similarly, the audio modulator 1400 delays the low frequency audio A2L in the second audio data A2 and the amplified second sub audio A21 by the first time length P1, and the low frequency audio A1L in the first audio data A1 and the amplification. The first sub-audio A11 is mixed to generate a first output audio A1o.

音訊播放器1500 具有第一聲道喇叭1510 與第二聲道喇叭1520。第一聲道喇叭1510 與第二聲道喇叭1520 均耦接至音訊調變模組1400，並且第一聲道喇叭1510 用以將第一輸出音訊A1o 輸出為類比音訊，而第二聲道喇叭1520 用以將第二輸出音訊A2o 輸出為類比音訊。The audio player 1500 has a first channel speaker 1510 and a second channel speaker 1520. The first channel speaker 1510 and the second channel speaker 1520 are both coupled to the audio modulation module 1400, and the first channel speaker 1510 is configured to output the first output audio A1o as analog audio, and the second channel speaker The 1520 is used to output the second output audio A2o as analog audio.

因此請參照圖3，其係依據本發明的音訊處理系統實際使用示意圖。如圖3 所示，當使用者2000 在第一聲道喇叭1510 與第二聲道喇叭1520 的前方時，使用者2000 的右耳聽到第一聲道喇叭1510 輸出的第一輸出音訊A1o，並聽到第二聲道喇叭1520 輸出的第二輸出音訊A2o。並如圖示，由於第一聲道喇叭1510 到右耳的距離D1 與第二聲道喇叭1520 到右耳的距離D2 不同，且距離D2 大於距離D1，因此右耳聽到的第一輸出音訊A1o 與第二輸出音訊A2o 有一段音程差，其時間差距恰等於(或近似於) 第一時間長度P1。也因此， 第一輸出音訊A1o 中關於第二音訊資料A2 的部分剛好與第二輸出音訊 A2o 中第二音訊資料A2 的部分相消。使得使用者2000 雖然並非使用耳機，但是其右耳所接受到的聲音訊號幾乎只有經過音訊放大器1300 調整過的第一子音訊A11 與第一音訊資料A1 的低頻音訊A1L。因為相同的原理，使用者2000 的左耳所接受到的聲音訊號幾乎只有經過音訊放大器1300調整過的第二子音訊A21 與第二音訊資料A2 的低頻音訊A2L。Therefore, please refer to FIG. 3, which is a schematic diagram of actual use of the audio processing system according to the present invention. As shown in FIG. 3, when the user 2000 is in front of the first channel speaker 1510 and the second channel speaker 1520, the right ear of the user 2000 hears the first output audio A1o output by the first channel speaker 1510, and The second output audio A2o output by the second channel speaker 1520 is heard. And as shown, since the distance D1 from the first channel speaker 1510 to the right ear is different from the distance D2 from the second channel speaker 1520 to the right ear, and the distance D2 is greater than the distance D1, the first output audio A1o heard by the right ear There is a pitch difference with the second output audio A2o, and the time difference is exactly equal to (or approximate to) the first time length P1. Therefore, the portion of the first output audio A1o with respect to the second audio material A2 is exactly canceled with the portion of the second audio material A2 of the second output audio A2o. Although the user 2000 does not use the earphone, the sound signal received by the right ear is almost only the first sub-audio A11 adjusted by the audio amplifier 1300 and the low-frequency audio A1L of the first audio data A1. Because of the same principle, the audio signal received by the left ear of the user 2000 is almost only the second sub-audio A21 adjusted by the audio amplifier 1300 and the low-frequency audio A2L of the second audio data A2.

於一實施例中，隨著距離D1 與距離D2 的改變，需要適當的調整第一音訊資料A1 與第二音訊資料A2 被放大及/或調變的程度，以讓使用者2000 獲得較佳的聽覺享受，因此請回到圖1，音訊處理系統1000 更具有距離偵測器1600。距離偵測器1600 耦接於音訊放大器1300，並用來偵測使用者2000 與第一聲道喇叭1510、第二聲道喇叭1520 的距離。於一種實作方式中，距離偵測器1600 係一雷射測距元件，用來測量使用者2000 與第一聲道喇叭1510 的距離。於另一種實作方式中，距離偵測器1600 係一麥克風，放置於使用者2000 身上，用來接收來自第一聲道喇叭1510 與第二聲道喇叭1520 的音效，並據據以判斷第一聲道喇叭1510 與第二聲道喇叭1520 與使用者的距離，將之回饋給第一濾波器1100 與第二濾波器1200。第一濾波器1100 依據此距離來決定其頻率響應。第二濾波器1200 依據此距離來決定其頻率響應。以第一濾波器1100 為例，第一濾波器1100 依據距離D1 來決定其各頻段( 低頻、中頻及/ 或高頻) 的放大倍率(gain) 或衰減倍率(attenuation) 。In an embodiment, as the distance D1 and the distance D2 change, it is necessary to appropriately adjust the extent to which the first audio data A1 and the second audio data A2 are enlarged and/or modulated, so that the user 2000 obtains a better one. Hearing enjoyment, so please return to Figure 1, the audio processing system 1000 further has a distance detector 1600. The distance detector 1600 is coupled to the audio amplifier 1300 and configured to detect the distance between the user 2000 and the first channel speaker 1510 and the second channel speaker 1520. In one implementation, the distance detector 1600 is a laser ranging component that measures the distance between the user 2000 and the first channel speaker 1510. In another implementation, the distance detector 1600 is coupled to a microphone and placed on the user 2000 for receiving sound effects from the first channel speaker 1510 and the second channel speaker 1520. The distance between the one-channel speaker 1510 and the second channel speaker 1520 and the user is fed back to the first filter 1100 and the second filter 1200. The first filter 1100 determines its frequency response based on this distance. The second filter 1200 determines its frequency response based on this distance. Taking the first filter 1100 as an example, the first filter 1100 determines the gain or attenuation of each frequency band (low frequency, intermediate frequency, and/or high frequency) according to the distance D1.

音訊放大器1300 之所以不處理第一音訊資料A1 的低頻音訊A1L 與第二音訊資料A2 的低頻音訊A2L，是因為低頻率的聲音對於人類的聽覺系統而言，其所包含的方向性資訊較少。因此音訊放大器1300 僅僅處理中高頻的聲音訊號，即可使使用者2000 在其第一輸出音訊A1o 與第二輸出音訊A2o 中感受到充分的聲音方向性資訊。The audio amplifier 1300 does not process the low frequency audio A1L of the first audio data A1 and the low frequency audio A2L of the second audio data A2 because the low frequency sound contains less directional information for the human auditory system. . Therefore, the audio amplifier 1300 only processes the mid-high frequency audio signal, so that the user 2000 can feel sufficient sound directivity information in the first output audio A1o and the second output audio A2o.

於某些實施例中，第一聲道喇叭1510 與第二聲道喇叭1520 的輸出頻率響應不一致，則第一濾波器1100 與第二濾波器1200的頻率響應係依據第一聲道喇叭1510 與第二聲道喇叭1520 的頻率響應而對應設置。具體的實作方式如下，將第一音訊資料A1 與第二音訊資料A2 賦予白噪音(whitenoise)或是掃頻訊號(Sweeptone)，並將之透過前述系統架構輸出，而以同一音源接收器(例如麥克風)分別接收兩個喇叭輸出的音效，並據以調整第一濾波器1100 及/或第二濾波器1200的頻率響應，直到兩個喇叭輸出的音效相同為止。In some embodiments, the output frequency response of the first channel speaker 1510 and the second channel speaker 1520 are inconsistent, and the frequency responses of the first filter 1100 and the second filter 1200 are based on the first channel speaker 1510 and The frequency response of the second channel speaker 1520 is correspondingly set. The specific implementation manner is as follows: the first audio data A1 and the second audio data A2 are given white noise or Sweeptone, and are output through the foregoing system architecture, and the same sound source receiver ( For example, the microphone receives the sound effects of the two speakers respectively, and adjusts the frequency response of the first filter 1100 and/or the second filter 1200 until the sound effects of the two speakers are the same.

於另一些實施例中，請參照圖4，其係依據本發明另一實施例的第一濾波器功能方塊圖。第一濾波器1100 具有低通濾波器(low-passfilter, LPF)與高通濾波器(high-passfilter, HPF)。第一濾波器1100 中的第一低通濾波器1110 用來對來自第一聲道的第一音訊資料A1 濾波，來得到第一音訊資料A1 中的低頻音訊A1L。第一濾波器1100 中的第一高通濾波器1120 用來對來自第一聲道的第一音訊資料A1 濾波，來得到第一音訊資料A1 中的高頻音訊A1H。第一濾波器1100並將第一音訊資料A1 與其低頻音訊A1L 以及其高頻音訊A1H 相減，以得到第一子音訊A11 ’。而第二濾波器1200 也具有同樣的架構，因此第二濾波器會輸出第二音訊資料A1 中的高頻音訊A2H、低頻音訊A2L與第二子音訊A21 ’。因此，以此實施例而言，第一子音訊A11 ’與第二子音訊A21 ’分別為第一音訊資料A1 的中頻成分與第二音訊資料A2 的中頻成分。而後音訊放大器1300 接收第一子音訊A11 ’與第二子音訊A21 ’，以本發明前述的方式進行處理。並且音訊調變器1400 直接從第一濾波器1100 接收第一音訊資料A1 中的高頻音訊A1H 與低頻音訊A1L，並直接從第二濾波器1200 接收第二音訊資料A2 中的高頻音訊與低頻音訊。音訊調變器1400 將來自第一濾波器1100 的音訊、來自第二濾波器1200 的音訊併同被音訊放大器1300 處理過的第一子音訊A11 ’與第二子音訊A12 ’，以前述的原則進行處理並最終輸出第一輸出音訊A1o 與第二輸出音訊A2o。 In other embodiments, please refer to FIG. 4, which is a block diagram of a first filter function according to another embodiment of the present invention. The first filter 1100 has a low-pass filter (LPF) and a high-pass filter (HPF). The first low pass filter 1110 in the first filter 1100 is configured to filter the first audio data A1 from the first channel to obtain the low frequency audio A1L in the first audio data A1. The first high pass filter 1120 in the first filter 1100 is configured to filter the first audio data A1 from the first channel to obtain the high frequency audio A1H in the first audio data A1. The first filter 1100 subtracts the first audio material A1 from its low frequency audio A1L and its high frequency audio A1H to obtain a first sub audio A11 ' . The second filter 1200 also has the same architecture, so the second filter outputs the high frequency audio A2H, the low frequency audio A2L and the second sub audio A21 ' in the second audio data A1. Therefore, in this embodiment, the first sub-audio A11 ′ and the second sub-audio A 21 ′ are respectively an intermediate frequency component of the first audio data A1 and an intermediate frequency component of the second audio data A2. The audio amplifier 1300 then receives the first sub-audio A11 ' and the second sub-audio A21 ' for processing in the manner previously described herein. And the audio modulator 1400 directly receives the high frequency audio A1H and the low frequency audio A1L in the first audio data A1 from the first filter 1100, and directly receives the high frequency audio in the second audio data A2 from the second filter 1200. Low frequency audio. The audio modulator 1400 combines the audio from the first filter 1100, the audio from the second filter 1200, and the first sub-audio A11 ' and the second sub-audio A12 ' processed by the audio amplifier 1300 by the foregoing principles. Processing and finally outputting the first output audio A1o and the second output audio A2o.

綜上所述，本發明所揭露的音訊處理方法，係從第一聲道的第一音訊資料與第二聲道的第二音訊資料中， 分別擷取其中頻(或中高頻) 的音訊， 並據以調整、放大第一音訊資料的中頻音訊與第二音訊資料的中頻音訊，以充實輸出音訊的方向性資訊。In summary, the audio processing method disclosed in the present invention extracts intermediate frequency (or medium high frequency) audio from the first audio data of the first channel and the second audio data of the second channel. And adjust and amplify the intermediate frequency audio of the first audio data and the intermediate frequency audio of the second audio data to enrich the directional information of the output audio.

雖然本發明以前述之實施例揭露如上，然其並非用以限定本發明。在不脫離本發明之精神和範圍內，所為之更動與潤飾，均屬本發明之專利保護範圍。關於本發明所界定之保護範圍請參考所附之申請專利範圍。Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

1000‧‧‧音訊處理系統
1100、1200‧‧‧濾波器
1110、1210‧‧‧低通濾波器
1120、1220‧‧‧高通濾波器
1300‧‧‧音訊放大器
1310‧‧‧波包偵測模組
1320‧‧‧可控放大模組
1400‧‧‧音訊調變器
1500‧‧‧音訊播放器
1510、1520‧‧‧喇叭
1600‧‧‧距離偵測器
2000‧‧‧使用者
A1、A2‧‧‧音訊資料
A11、A21‧‧‧子音訊
A11’、A21’‧‧‧子音訊
A1L、A2L‧‧‧低頻音訊
A1H、A2H‧‧‧高頻音訊
A1o、A2o‧‧‧輸出音訊
D1、D2‧‧‧距離1000‧‧‧Audio Processing System
1100, 1200‧‧‧ filter
1110, 1210‧‧‧ low pass filter
1120, 1220‧‧‧ high-pass filter
1300‧‧‧Audio Amplifier
1310‧‧‧Band packet detection module
1320‧‧‧Controllable Amplifier Module
1400‧‧‧Operation Transducer
1500‧‧‧ audio player
1510, 1520‧‧‧ speakers
1600‧‧‧Distance Detector
2000‧‧‧Users
A1, A2‧‧‧ audio information
A11, A21‧‧‧ sub-audio
A11 ' , A21 ' ‧‧‧ sub-audio
A1L, A2L‧‧‧ low frequency audio
A1H, A2H‧‧‧ high frequency audio
A1o, A2o‧‧‧ output audio
D1, D2‧‧‧ distance

圖1 係依據本發明一實施例的音訊處理系統架構示意圖。圖2 係依據本發明一實施例的音訊放大器的架構示意圖。圖3 係依據本發明的音訊處理系統實際使用示意圖。圖4 係依據本發明另一實施例的第一濾波器功能方塊圖。1 is a schematic diagram showing the architecture of an audio processing system according to an embodiment of the present invention. 2 is a block diagram showing the structure of an audio amplifier according to an embodiment of the invention. Figure 3 is a schematic illustration of the actual use of an audio processing system in accordance with the present invention. 4 is a functional block diagram of a first filter in accordance with another embodiment of the present invention.

1000‧‧‧音訊處理系統 1000‧‧‧Audio Processing System

1100、1200‧‧‧濾波器 1100, 1200‧‧‧ filter

1110‧‧‧低通濾波器 1110‧‧‧ low pass filter

1300‧‧‧音訊放大器 1300‧‧‧Audio Amplifier

1400‧‧‧音訊調變器 1400‧‧‧Operation Transducer

1500‧‧‧音訊播放器 1500‧‧‧ audio player

1510、1520‧‧‧喇叭 1510, 1520‧‧‧ speakers

1600‧‧‧距離偵測器 1600‧‧‧Distance Detector

Claims (14)

一種音訊處理方法，適於一音訊處理系統，該方法包含：取得一第一音訊資料的一第一子頻音訊；取得一第二音訊資料的一第二子頻音訊；依據該第一子頻音訊與該第二子頻音訊，決定一音訊參數；以及以該音訊參數，調變該第一音訊資料與該第二音訊資料，以得到一第一輸出音訊與一第二輸出音訊。An audio processing method, which is suitable for an audio processing system, the method comprising: obtaining a first sub-frequency audio of a first audio data; obtaining a second sub-frequency audio of a second audio data; The audio signal and the second sub-frequency signal determine an audio parameter; and the first audio data and the second audio data are modulated by the audio parameter to obtain a first output audio and a second output audio. 如請求項1所述的方法，其中於依據該第一子頻音訊與該第二子頻音訊，決定該音訊參數的步驟中，包含：比較該第一子頻音訊與該第二子頻音訊；當該第一子頻音訊的音量大於該第二子頻音訊的音量時，依據該第一子頻音訊的音量決定該音訊參數；以及當該第一子頻音訊的音量不大於該第二子頻音訊的音量時，依據該第二子頻音訊的音量決定該音訊參數。The method of claim 1, wherein the step of determining the audio parameter according to the first sub-frequency audio and the second sub-frequency audio comprises: comparing the first sub-frequency audio with the second sub-frequency audio When the volume of the first sub-frequency audio is greater than the volume of the second sub-frequency audio, determining the audio parameter according to the volume of the first sub-frequency audio; and when the volume of the first sub-frequency audio is not greater than the second When the volume of the sub-frequency audio is received, the audio parameter is determined according to the volume of the second sub-frequency audio. 如請求項2所述的方法，其中於比較該第一子頻音訊與該第二子頻音訊的步驟中，包含：取得該第一子頻音訊的一第一波包；取得該第二子頻音訊的一第二波包；以及比較該第一波包與該第二波包。The method of claim 2, wherein the step of comparing the first sub-frequency audio and the second sub-frequency audio comprises: acquiring a first wave packet of the first sub-frequency audio; acquiring the second sub- a second wave packet of the frequency audio; and comparing the first wave packet with the second wave packet. 如請求項1所述的方法，其中於取得該第一子頻音訊的步驟的步驟中，包含：以一第一低通濾波器擷取該第一音訊資料的低頻音訊；以及將該第一音訊資料減去該第一音訊資料的低頻音訊，以得到該第一子頻音訊。The method of claim 1, wherein the step of obtaining the first sub-frequency audio comprises: capturing a low-frequency audio of the first audio data by using a first low-pass filter; and The audio data is subtracted from the low frequency audio of the first audio data to obtain the first sub-frequency audio. 如請求項4所述的方法，其中於取得該第一子頻音訊的步驟的步驟中，更包含：以一第一高通濾波器擷取該第一音訊資料的高頻音訊；其終於取得該第一子頻音訊的步驟中更包含將該第一音訊資料減去該第一音訊資料的高頻音訊，以得到該第一子頻音訊。The method of claim 4, wherein the step of obtaining the first sub-frequency audio further comprises: capturing a high-frequency audio of the first audio data by using a first high-pass filter; The step of the first sub-frequency audio further includes subtracting the high-frequency audio of the first audio data from the first audio data to obtain the first sub-frequency audio. 如請求項4所述的方法，其中該音訊處理系統包含一第一聲道喇叭以播放該第一輸出音訊，並且該第一低通濾波器的頻率響應係對應於該第一聲道喇叭的頻率響應。The method of claim 4, wherein the audio processing system includes a first channel speaker to play the first output audio, and the frequency response of the first low pass filter corresponds to the first channel speaker Frequency response. 如請求項1所述的方法，其中該音訊處理系統包含一距離偵測器以偵測一使用者與該音訊處理系統的一距離，並且於決定該音訊參數的步驟中，更依據該距離以決定該音訊參數。The method of claim 1, wherein the audio processing system includes a distance detector to detect a distance between a user and the audio processing system, and in the step of determining the audio parameter, further based on the distance Determine the audio parameters. 一種音訊處理系統，包含：一第一濾波器，用以將一第一音訊資料濾波，以得到該第一音訊資料的一第一低頻音訊與一第一子音訊，其中該第一子音訊與該第一低頻音訊組成該第一音訊資料；一第二濾波器，用以將一第二音訊資料濾波，以得到該第二音訊資料的一第二低頻音訊與一第二子音訊，其中該第二子音訊與該第二低頻音訊組成該第二音訊資料；一音訊放大器，耦接至該第一濾波器與該第二濾波器，用以依據該第一子音訊與該第二子音訊，決定一音訊放大參數，並以該音訊放大參數放大該第一子音訊與該第二子音訊；一音訊調變器，分別耦接該第一濾波器、該第二濾波器與該音訊放大器，用以依據該第一低頻音訊、該第二低頻音訊、被放大的該第一子音訊與被放大的該第二子音訊，產生一第一輸出音訊與一第二輸出音訊；以及一音訊播放器，耦接至該音訊調變器，用以輸出該第一輸出音訊與該第二輸出音訊。An audio processing system includes: a first filter for filtering a first audio data to obtain a first low frequency audio and a first sub audio of the first audio data, wherein the first sub audio and The first low frequency audio is used to form the first audio data; and a second filter is used to filter a second audio data to obtain a second low frequency audio and a second sub audio of the second audio data. The second sub-audio and the second low-frequency audio comprise the second audio data; an audio amplifier coupled to the first filter and the second filter, according to the first sub-audio and the second sub-audio Determining an audio amplification parameter, and amplifying the first sub-audio and the second sub-audio with the audio amplification parameter; an audio modulator coupled to the first filter, the second filter, and the audio amplifier respectively And generating a first output audio and a second output audio according to the first low frequency audio, the second low frequency audio, the amplified first sub audio, and the amplified second sub audio; and an audio message player Coupled to the audio modulator, for outputting the first output and the second audio output audio. 如請求項8所述的系統，其中該第一濾波器包含：一第一低通濾波器，用以依據所接收的該第一音訊資料產生該第一低頻音訊；以及一減法器，耦接至該第一低通濾波器用以將該第一音訊資料減去該第一低頻音訊，以產生該第一子音訊。The system of claim 8, wherein the first filter comprises: a first low pass filter for generating the first low frequency audio according to the received first audio data; and a subtractor coupled The first low pass filter is configured to subtract the first low frequency audio from the first audio data to generate the first sub audio. 如請求項9所述的系統，其中該第一濾波器更包含：一高通濾波器，用以依據該第一音訊資料產生一第一高頻音訊；其中該減法器於產生該第一子音訊時，係將該第一音訊資料減去該第一低頻音訊與該第一高頻音訊已產生該第一子音訊。The system of claim 9, wherein the first filter further comprises: a high pass filter for generating a first high frequency audio according to the first audio data; wherein the subtractor generates the first sub audio And subtracting the first low frequency audio from the first audio data and the first high frequency audio to generate the first sub audio. 如請求項8所述的系統，其中該音訊放大器包含：一波包偵測模組，耦接接該第一濾波器與該第二濾波器，用以偵測該第一子音訊的一第一波包，並用以偵測該第二子音訊的一第二波包，而比較該第一波包的音量與該第二波包的音量，以對應決定該音訊放大參數；以及一可控放大模組，耦接該波包偵測模組、該第一濾波器與該第二濾波器，用以依據該音訊放大參數，放大該第一子音訊與該第二子音訊。The system of claim 8, wherein the audio amplifier comprises: a wave packet detection module coupled to the first filter and the second filter for detecting a first sub-audio a wave packet for detecting a second wave packet of the second sub-audio, comparing a volume of the first wave packet with a volume of the second wave packet to correspondingly determine the audio amplification parameter; and a controllable The amplification module is coupled to the wave packet detection module, the first filter and the second filter, for amplifying the first sub-audio and the second sub-audio according to the audio amplification parameter. 如請求項8所述的系統，更包含一距離偵測器，通訊連接至該第一濾波器與該第二濾波器，該距離偵測器用以偵測一使用者與該音訊處理系統的一距離，並且該第一濾波器與該第二濾波器更分別依據該距離調整各別的頻率響應。The system of claim 8, further comprising a distance detector coupled to the first filter and the second filter, the distance detector for detecting a user and the audio processing system The distance, and the first filter and the second filter respectively adjust respective frequency responses according to the distance. 如請求項12所述的系統，其中該距離偵測器係一音訊接收器，配置於該使用者身上，用以接收該第一輸出音訊的聲音、該第二輸出音訊的聲音、該第一輸出音訊的電氣信號與該第二輸出音訊的電氣信號，並據以計算該距離。The system of claim 12, wherein the distance detector is an audio receiver disposed on the user for receiving the sound of the first output audio, the sound of the second output audio, the first The electrical signal of the audio and the electrical signal of the second output audio are output and the distance is calculated accordingly. 如請求項8所述的系統，其中該音訊播放器包含：一第一聲道喇叭，耦接至該音訊調變器，以該第一輸出音訊輸出聲音；以及一第二聲道喇叭，耦接至該音訊調變器，以該第二輸出音訊輸出聲音；其中該第一濾波器的頻率響應係對應於該第一聲道喇叭的頻率響應，且該第二濾波器的頻率響應係對應於該第二聲道喇叭的頻率響應。The system of claim 8, wherein the audio player comprises: a first channel speaker coupled to the audio modulator, the first output audio output sound; and a second channel speaker coupled Connected to the audio modulator, the sound is outputted by the second output audio; wherein the frequency response of the first filter corresponds to the frequency response of the first channel speaker, and the frequency response of the second filter corresponds to The frequency response of the second channel speaker.
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